I think you might be confusing SXL and SUN. The original question was about ETP taking over, and eliminating, SXL. The fact that SXL completely disappeared is why its passive losses were transferred to ETP, and the SXL K-1 got deleted from TT.
This year, ET took over, but did not eliminate, ETP. ETP still exists as a legal entity, but doesn't publicly trade anymore. That's why you'd combine the values for old and new ETP (again, assuming the same FEIN).
SUN and USAC are both operating, publicly traded PTPs. You may not own shares in them directly, but since ET owns a position in each of them, and you own ET, you have indirect ownership. That's why the ET K-1 breaks their financials into 4 different pieces: ET, ETP, SUN, and USAC, each with their own FEINs and K-1 values. You have to maintain separate K-1s in TT, with separate loss carryovers, until you sell ET or it otherwise disposes of those positions.
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**Note also, I'm not a Tax Preparer/CPA. Just a volunteer, seasoned, TurboTax user.
Use any advice accordingly!
